OHDEK GALLING. 113 



have the black predominant in their plumage, and the temples 

 naked, as well as the base of the bill. In general it may be 

 remarked, that the bastard races, and the young of these two 

 species, and also of Craa; Globicera^ have their plumage more 

 varied, and far more agreeable to the eye than the uniform 

 livery of the adult individuals of the pure race. 



Of the curious formation of the trachea we must be 

 permitted to say a few words. The entire tube has a flatted 

 form, more membranous than cartilaginous ; the rings are 

 entire, and very distant one from the other. From the glottis, 

 as far as the place where the second curve takes place, the rings 

 are nearly cylindrical ; there they become double the size^ and 

 very much flatted. This tube describes a broad curvature 

 between the bones of the furca — goes back in this form the 

 length of two inches over the muscles of the neck — makes 

 there a second circumvolution — after which the rings, though 

 broader than those of the upper part of the trachea, resume 

 an equal form. From thence the tube of the trachea, com- 

 pressed at the sides, preserves this form as far as the lower 

 larynx, where it is suddenly dilated. The lower larynx is 

 formed by a single membranous piece, supported by a broad 

 ring, from which the bronchiae depend. In the bottom of the 

 glottis is a triangular and very prominent socle or foot-base. 

 This glottis is not supported by the tail of the hyoid bone, but 

 it holds to the tongue by the membranaceous tissue of the 

 oesophagus, as in the genera of the cock and the pheasant. 



The eggs of the Mitouporanga, or Crested Curassow^ 

 are about the size of those of the turkey, and are of a pure 

 white, like those of the hen. 



This species of Hocco inhabits Guiana, Mexico, Brazil, and 

 Paraguay. Some are also found in the island of Porto-Rico. 



We shall now make a few remarks on the next species in 

 Cuvier's text, the Globose Curassow, (Crax Globicera,) 

 called ^eucholi by the Mexicans. 



VOL. VIII. I 



